| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic elevator device which reduces vibration in a pulsation frequency band peculiar to a hydraulic pump, and improves the riding comfort of a car, and makes living environment inside a building provided with the hydraulic elevator silent. SOLUTION: A hydraulic elevator device is provided with a hydraulic jack 8 which is extended by a hydraulic oil 2 supplied through a flow rate control valve 7 from a hydraulic pump device 3 to raise a car 10, and a resonance type pulsation damping device 13 which is connected to a pipeline 6 between the hydraulic pump device 3 and a flow rate control valve 7 and corresponds to the frequency band of a pulsation component in the hydraulic pump 4. Thus the transmission of vibration noise due to resonance with vibration in the pulsation frequency band peculiar to the hydraulic pump 4, namely a low frequency band, is reduced, and the vibration in the low frequency band can therefore be reduced regardless of the length of a pipeline and the size of an elevating stroke of the car 10. |
